Cleaners are the unseen heroes of the bonding process. The wrong product or wrong use can reduce the performance of even the best adhesive.
Three different purposes
- Surface pre-cleaning: Removing oil, dust, release agents and fingerprints.
- Machine and equipment cleaning: Removing hot melt and PUR residues.
- Hand and tool cleaning: Safely removing uncured adhesive.
Care in surface cleaning
- The cleaner must leave no residue; some leave an oily film that ruins adhesion.
- Wait until the solvent has fully evaporated after cleaning.
- On plastics, test that the cleaner does not cause stress cracking.
| Application | Suitable product type |
|---|---|
| Metal, glass pre-cleaning | Fast-evaporating solvent-based cleaner |
| PUR machine flushing | PUR-specific cleaning agent |
| EVA/PO tank cleaning | Hot melt cleaner |
| Hand cleaning | Skin-friendly hand cleaner |
Flushing PUR systems
If PUR cures in the machine it is very hard to remove. Flushing the system with a PUR cleaning agent at the end of production or before long stops extends nozzle and hose life.
Safety
Cleaners are usually flammable. Ensure good ventilation, wear suitable gloves and goggles, and follow the safety data sheet.
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